Beside pH, what is the other environmental factor that affects the function of enzymes?

Which cytoskeletal element in eukaryotes are composed of actin proteins and functions in cell mobility and help determine cell shape?

The sodium-potassium pump transports sodium and potassium ions into and out of the cell. It is an example of what type of membrane protein?

Each subunit of the ribosome is composed of:

Cells are small because:

Each subunit of the ribosome is composed of:

Label the structures indicated by an arrow. A. _______________ B. _______________   

Cells are small because:

The Na+ channel protein is found in the membranes of muscle cells. Which of the following organelles are involved in its synthesis and transport to the membrane? (select ALL that applies) 

___________ is the fluid portion of the cytoplasm of cells